The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
the conversion efficiency of dietary beta-carotene to retinol is in the range of 3.6 to 28 to 1 by weight which means that you need 3.6 to 28 times as much beta-carotene to get the an equivalent amount of bioavailable retinoic acid into retinal palmitate bioavailable vitamin a in humans
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
the rate of conversion even in those who can use the bc on bc mo enzyme to cleave beta-carotene into retinoic acid or retinoic acid precursors the rate of conversion is anywhere from three to 28 times slower than pre-formed vitamin a suggesting that you need 3 to 28 times more beta-carotene to get your equivalent dose of active retinal or retinoic acid retinol palmitate as a human being